2016-Sustainable Industrial Processing Summit
SIPS 2016 Volume 10: Battery, Recycling, Environmental, Mining

Editors:	Kongoli F, Kumar V, Aifantis K, Pagnanelli F
Publisher:	Flogen Star OUTREACH
Publication Year:	2016
Pages:	220 pages
ISBN:	978-1-987820-54-6
ISSN:	2291-1227 (Metals and Materials Processing in a Clean Environment Series)

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Influences of Additions of the Slag from Base Metals Smelting on Strengths of Cemented Paste Backfill of Mill Tailings

Qixing Yang¹; Qi Jia²; Lijie Guo³; Sven Knutsson⁴; Peng Xue⁵; Guiqun Liu⁶; Liang Jiang⁶;
¹DIVISION OF MINERALS AND METALLURGICAL ENGINEERING (MIMER), Lulea, Sweden; ²LULEå UNIVERSITY OF TECHNOLOGY, LULEÅ, Sweden; ³BEIJING GENERAL RESEARCH INSTITUTE OF MINING & METALLURGY, Beijing, China; ⁴LULEå UNIVERSITY OF TECHNOLOGY, Luleå, Sweden; ⁵UNIVERSITY OF SCIENCE AND TECHNOLOGY BEIJING, Beijing, China; ⁶BEIFANG UNIVERSITY OF NATIONALITIES, Yinchuan, China;
Type of Paper: Regular
Id Paper: 161
Topic: 4

Abstract:

Via operations of mine backfilling, such as the cemented paste backfill (CPB), the underground voids resulted from mining are filled with waste materials, mainly mill tailings, to provide ground support allowing for a safer working environment and higher ore recovery. The Boliden group uses 96% mill tailings and 4% binder as materials for its CPB operations in Sweden. The operations of concentrates smelting at Ronnskar Smelter of the group generate a slag, which is water-granulated to produce a glassy slag product with an output of 250000 ton/year. The product with particles of sizes<6 mm contains more than 80% of Fe and Si oxides and is named as Fe sand, which has been used for road constructions for many years. Influences of additions of the Fe sand on CPB strengths was investigated in the present study. Different parts of iron sand were mixed together with the tailings sand to make cylinders of the CPB samples. Uniaxial compression tests were performed for the samples after 28 days of curing. The porosities of the samplers after curing were determined. Results from uniaxial compression tests showed that the amount of iron sand added influences positively the UCS developments, as well as content values of fines and porosity. By using the present results, utilizations of a part of Fe-sand together with the tailings sand to increase UCS values for the CPB samples are possible, which will be beneficial for both environmental protection and resource conservation.

Keywords:

Metal; Mining; Sustainability; Tailings; Underground;


References:

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Cite this article as:

Yang Q, Jia Q, Guo L, Knutsson S, Xue P, Liu G, Jiang L. Influences of Additions of the Slag from Base Metals Smelting on Strengths of Cemented Paste Backfill of Mill Tailings. In: Kongoli F, Kumar V, Aifantis K, Pagnanelli F, editors. Sustainable Industrial Processing Summit SIPS 2016 Volume 10: Battery, Recycling, Environmental, Mining. Volume 10. Montreal(Canada): FLOGEN Star Outreach. 2016. p. 180-191.